X87: [turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

  port 2166bd8c (r33797)

  original commit message:

BUG=

Review URL: https://codereview.chromium.org/1697953002

Cr-Commit-Position: refs/heads/master@{#33969}

src/compiler/x87/code-generator-x87.cc

@@ -1209,6 +1209,26 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       }
       break;
     }
+    case kX87Float32ToUint32: {
+      if (!instr->InputAt(0)->IsDoubleRegister()) {
+        __ fld_s(i.InputOperand(0));
+      }
+      Label success;
+      __ TruncateX87TOSToI(i.OutputRegister(0));
+      __ test(i.OutputRegister(0), i.OutputRegister(0));
+      __ j(positive, &success);
+      __ push(Immediate(INT32_MIN));
+      __ fild_s(Operand(esp, 0));
+      __ lea(esp, Operand(esp, kPointerSize));
+      __ faddp();
+      __ TruncateX87TOSToI(i.OutputRegister(0));
+      __ or_(i.OutputRegister(0), Immediate(0x80000000));
+      __ bind(&success);
+      if (!instr->InputAt(0)->IsDoubleRegister()) {
+        __ fstp(0);
+      }
+      break;
+    }
     case kX87Float64ToInt32: {
       if (!instr->InputAt(0)->IsDoubleRegister()) {
         __ fld_d(i.InputOperand(0));

src/compiler/x87/instruction-codes-x87.h

@@ -60,6 +60,7 @@ namespace compiler {
   V(X87Uint32ToFloat64)            \
   V(X87Float64ToInt32)             \
   V(X87Float32ToInt32)             \
+  V(X87Float32ToUint32)            \
   V(X87Float64ToFloat32)           \
   V(X87Float64ToUint32)            \
   V(X87Float64ExtractHighWord32)   \

src/compiler/x87/instruction-selector-x87.cc

@@ -691,7 +691,8 @@ void InstructionSelector::VisitTruncateFloat32ToInt32(Node* node) {
 
 
 void InstructionSelector::VisitTruncateFloat32ToUint32(Node* node) {
-  UNIMPLEMENTED();
+  X87OperandGenerator g(this);
+  Emit(kX87Float32ToUint32, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }